Engineee.pdf

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2001-03 ENGINES
Engine Mechanical - 2.0L 4-Cylinder - RAV4
COMPRESSION
INSPECTION
NOTE:
If there is lack of power, excessive oil consumption or poor fuel economy,
measure the compression pressure.
1.
Warm up and stop engine
.
Allow the engine to warm up to normal operating temperature.
2.
Remove ignition coils (See REMOVAL & INSTALLATION (RAV4) )
.
3.
Remove spark plugs
.
4.
Inspect cylinder compression pressure
.
a. Insert a compression gauge into the spark plug hole.
b. Fully open the throttle.
c. While cranking the engine, measure the compression pressure.
NOTE:
Always use a fully charged battery to obtain engine speed of 250
RPM or more.
d. Repeat steps (a) through (c) for each cylinder.
Fig. 1: Displaying Compression Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NOTE:
This measurement must be done in as short a time as possible.
Compression pressure: 1,270 kPa (13.0 kgf/cm
2
, 184 psi)
Minimum pressure: 1,000 kPa (10.2 kgf/cm
2
, 145 psi)
Difference between each cylinder: 100 kPa (1.0 kgf/cm
2
, 15 psi) or less
e. If the cylinder compression in one more cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat steps (a) through (c) for cylinders with low
compression.
If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are
worn or damaged.
If pressure stays low, a valve may be sticking or seating is improper, or there may be leakage
through the gasket.
5.
Reinstall spark plugs
.
6.
Reinstall ignition coils (See REMOVAL & INSTALLATION (RAV4) )
.
VALVE CLEARANCE
ADJUSTMENT
NOTE:
1.
2.
3.
4.
Inspect and adjust the valve clearance when the engine is cold.
Remove RH engine under cover
.
Remove air cleaner assembly (See REMOVAL ).
Remove cylinder head cover (See REMOVAL )
.
Set No. 1 cylinder to TDC/compression
.
a. Turn the crankshaft pulley, and align its groove with timing mark 0 of the timing chain cover.
Fig. 2: Aligning Crankshaft Pulley
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Check that the timing marks of the camshaft timing sprocket and VVT timing sprocket are aligned
with the timing marks of the No. 1 and No. 2 bearing caps as shown in the illustration.
If not, turn the crankshaft 1 revolution (360°) and align the marks as above.
Fig. 3: Checking Timing Marks
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
5.
Inspect valve clearance
.
Fig. 4: Locating Valves Clearance
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Check only the valves indicated.
1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
2. Record the out-of-specification valve clearance measurements. They will be used later to
determine the required replacement adjusting valve lifter.
Valve clearance (Cold):
Fig. 5: Displaying Valve Clearance Specifications
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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